[GSoC Daily Log]: Back to datasheet!

Tuesday, 3rd June, 2014:

  • Tried to read power-on default values of different registers of AD9984A:
    • Default values read: [0, 105, 208, 72, 128, 64, 0, 64, 0, 64, 0, 64, 0, 64, 0, 64, 0, 32, 24, 32, 24, 10, 0, 0, 32, 8, 20, 91, 255, 120, 52, 148, 10, 245, 182, 176, 66, 9, 0, 216, 252, 8, 0, 228, 51]
    • First value is Silicon Revision Number, which should by default read 32, don’t know why its reading 0.
    • Most of the other values are matching correctly except the last register value shown 51, It changes randomly with every read. Will inspect it further.
  • Reading the datasheet starting from the ‘Theory of Operation’ (page 11):
    • RGB signal ‘Clamping’ is not required for typical PC graphics. It was mostly used in earlier sources.
  • Removed one short-circuit found b/w VD and B0_IN signal. No damage from it, since VGA connector was never connected and since it is coupled using a capacitor, it prevented any short. But, slight current surge during powering phase may have occurred earlier.

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